Deep Clone of code first EF Entity

I am attempting a Generic Deep Clone Routine for code first Entity Framework entities.

I've cracked it for the standard System property types but am having trouble with Proxy Entities (defined with virtual) i.e.

[EntityLookup]
public virtual Person { get; set; }

[EntityLookup] is one of my own attributes that helps further define the Association.

If I remove the "virtual" keyword, my routine can update the destination entity property no problem (but I lose the additional EF functionality) With virtual I get the following error;

System.Reflection.TargetException: 'Object does not match target type.'

I believe it's all to do with EF's Proxy class but I'm not sure how to cast the original entity so I can set it on the destination. Below are the essentials of the Clone routine for this issue;

public static void CloneProperties<T>(T Original, T Destination)    
{
    PropertyInfo[] props = Original.GetType().GetProperties();
    foreach (var propertyInfo in props)
    {
        if (propertyInfo.PropertyType.Namespace == "System" || propertyInfo.PropertyType.IsEnum)....
        else
        {
                if (Destination.PropertyHasCustomAttribute (propertyInfo.Name, typeof(EntityLookupAttribute)))
                {
                    var pv = propertyInfo.GetValue(Original, null);
                    propertyInfo.SetValue(Destination, pv, null);
                }
         }
    }
}

It's the "propertyInfo.SetValue(Destination, pv, null);" that generates the error when the entity is declared virtual.

Any help on getting it to work will be gratefully accepted

Best Regards

Lance